A.政治算術(shù)學(xué)派B.國勢學(xué)派C.數(shù)理統(tǒng)計學(xué)派D.社會統(tǒng)計學(xué)派
A.平均數(shù)B.相對數(shù)C.絕對數(shù)D.眾數(shù)